{"id":"CVE-2025-53835","aliases":["GHSA-w3wh-g4m9-783p"],"url":"https://o3.security/vulnerability/CVE-2025-53835","summary":"XWiki Rendering is vulnerable to XSS attacks through insecure XHTML syntax","details":"XWiki Rendering is a generic rendering system that converts textual input in a given syntax (wiki syntax, HTML, etc) into another syntax (XHTML, etc). Starting in version 5.4.5 and prior to version 14.10, the XHTML syntax depended on the `xdom+xml/current` syntax which allows the creation of raw blocks that permit the insertion of arbitrary HTML content including JavaScript. This allows XSS attacks for users who can edit a document like their user profile (enabled by default). This has been fixed in version 14.10 by removing the dependency on the `xdom+xml/current` syntax from the XHTML syntax. Note that the `xdom+xml` syntax is still vulnerable to this attack. As it's main purpose is testing and its use is quite difficult, this syntax shouldn't be installed or used on a regular wiki. There are no known workarounds apart from upgrading.","published":"2025-07-14T23:00:35.577Z","modified":"2026-08-07T20:17:54.589497Z","cvss":{"score":9,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.xwiki.rendering:xwiki-rendering-syntax-xhtml","fixedVersion":"14.10"}],"fix":{"url":"https://github.com/xwiki/xwiki-rendering/commit/a4ca31f99f524b9456c64150d6f375984aa81ea7","label":"xwiki/xwiki-rendering@a4ca31f"},"references":[{"type":"WEB","url":"https://jira.xwiki.org/browse/XRENDERING-660"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/53xxx/CVE-2025-53835.json"},{"type":"ADVISORY","url":"https://github.com/xwiki/xwiki-rendering/security/advisories/GHSA-w3wh-g4m9-783p"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-53835"},{"type":"FIX","url":"https://github.com/xwiki/xwiki-rendering/commit/a4ca31f99f524b9456c64150d6f375984aa81ea7"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T20:17:54.589497Z"}}